The way I do this, I duplicate each entry for the commit-under-splitting N+1 times when splitting it into N parts. Then for each, I manually edit the commit to

The way I do this, I duplicate each entry for the commit-under-splitting N+1 times when splitting it into N parts. Then for each, I manually edit the commit to its desired state during the interactive rebase, and then the last one should be empty (or only consist of leftover changes that should be dropped).